Nonblocking send

Nonblocking Send

• Consider the standard nonblocking send routine:

        mpi_isend (
                  IN  start_of_buffer,
                  IN  number_of_items,
                  IN  datatype,
                  IN  destination_rank,
                  IN  tag,
                  IN  communicator,
                  OUT request_id,
                  OUT error_code)